// // This code is part of Document Solutions for Imaging demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using System.Collections.Generic; using System.Linq; using System.Numerics; using GrapeCity.Documents.Drawing; using GrapeCity.Documents.Text; using GrapeCity.Documents.Imaging; using GCTEXT = GrapeCity.Documents.Text; using GCDRAW = GrapeCity.Documents.Drawing; namespace DsImagingWeb.Demos { // This sample demonstrates how to use different grayscale effects. // See also MatrixEffects1 and MatrixEffects2. public class GrayscaleEffects { public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null) { opaque = false; var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, opaque, dpi, dpi); using (var origBmp = new GcBitmap()) { // Load a sample photo: var imagePath = Path.Combine("Resources", "Images", "maple.jpg"); using (var stm = new FileStream(imagePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.RandomAccess)) origBmp.Load(stm); origBmp.SetAlphaTo255(); origBmp.Opaque = false; // Resize the original photo so we can place 4 samples of it // on the resulting bitmap: int w = pixelSize.Width / 2; int h = pixelSize.Height / 2; using (var sizedBmp = origBmp.Resize(w, h, InterpolationMode.Cubic)) { // Copy the resized original into 4 quadrants of the resulting bitmap: bmp.BitBlt(sizedBmp, 0, 0); bmp.BitBlt(sizedBmp, w, 0); bmp.BitBlt(sizedBmp, 0, h); bmp.BitBlt(sizedBmp, w, h); } // Moving the 3 lines with the "ApplyEffect" comment from below to here // will apply the effects only to the photos but not to the texts. // Add borders between the quadrants, and captions for each: var lineh = 2; using (var g = bmp.CreateGraphics(null)) { var foreColor = Color.Yellow; var backColor = Color.Blue; var font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeMono.ttf")); g.DrawLine(w, 0, w, h * 2, new GCDRAW.Pen(foreColor, lineh * 2)); g.DrawLine(0, h, w * 2, h, new GCDRAW.Pen(foreColor, lineh * 2)); var tf = new TextFormat() { Font = font, FontSize = 18, ForeColor = foreColor, BackColor = backColor, FontBold = true }; g.DrawString(" Original image ", tf, new PointF(0, 0)); g.DrawString(" GrayscaleStandard.BT601 ", tf, new PointF(w + lineh, 0)); g.DrawString(" GrayscaleStandard.BT709 ", tf, new PointF(0, h + lineh)); g.DrawString(" GrayscaleStandard.BT2100 ", tf, new PointF(w + lineh, h + lineh)); } // ApplyEffect (move this code up to before drawing texts // to limit it to photos only and not affect the captions). // // Keep the pixels in top left quadrant intact, // apply effects to the other 3 quadrants: bmp.ApplyEffect(GrayscaleEffect.Get(GrayscaleStandard.BT601), new Rectangle(w + lineh, 0, w - lineh, h - lineh)); bmp.ApplyEffect(GrayscaleEffect.Get(GrayscaleStandard.BT709), new Rectangle(0, h + lineh, w - lineh, h - lineh)); bmp.ApplyEffect(GrayscaleEffect.Get(GrayscaleStandard.BT2100), new Rectangle(w + lineh, h + lineh, w - lineh, h - lineh)); } return bmp; } } }